Dimethyl carbonate extraction equipment

Abstract

The utility model discloses dimethyl carbonate extraction equipment which comprises an extraction device, one end of the extraction device is connected with a cooling mechanism, the bottom end of the cooling mechanism is provided with a recycling pool, the top end of the cooling mechanism is connected with an activated carbon adsorber, and the activated carbon adsorber comprises an activated carbon filter disc. Clamping grooves are formed in the upper surface and the lower surface in the activated carbon adsorber in parallel. The utility model relates to the technical field of dimethyl carbonate production. According to the dimethyl carbonate extraction equipment, an activated carbon filter disc is automatically locked after being inserted and can be unlocked by pressing a pressing block, so that the problems that the replacement process of a filter element of an activated carbon adsorber is complicated and time cost is consumed are solved, the investment of working time of maintenance personnel is reduced, and the use applicability of the equipment is improved; and meanwhile, small molecules in the tail gas can be absorbed through the arrangement of the activated carbon adsorber, and combustion treatment on the tail gas in the next step is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of dimethyl carbonate production technology, specifically a dimethyl carbonate extraction device. Background Technology

[0002] Dimethyl carbonate (DMC), as an important green chemical product, is widely used in many fields such as organic synthesis, coatings, and electronic chemicals due to its good reactivity and low toxicity. During the extraction and production of DMC, tail gases are inevitably generated. These tail gases typically contain unreacted raw materials, intermediate products, and volatile organic compounds (VOCs) such as DMC. If these tail gases are not effectively treated, it will not only waste resources but also cause serious harm to the environment and human health.

[0003] If the condensable organic compounds in the tail gas produced during dimethyl carbonate (DMC) production are not effectively recovered, it will not only waste resources but also aggravate environmental pollution. Traditional tail gas treatment methods often struggle to achieve both efficient recovery and compliance with emission standards. Furthermore, some key components in tail gas treatment equipment, such as activated carbon adsors, are complex and time-consuming to replace, affecting the continuous operation of the equipment.

[0004] To address this issue, the present invention provides a dimethyl carbonate extraction device that solves the aforementioned problem by setting the activated carbon filter sheet to a plug-in locking structure, allowing the filter sheet to be automatically locked and unlocked by pressing. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a dimethyl carbonate extraction device that solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dimethyl carbonate extraction device, comprising an extraction apparatus, one end of which is connected to a cooling mechanism, a recovery tank at the bottom of the cooling mechanism, and an activated carbon adsorber at the top of the cooling mechanism. The activated carbon adsorber includes an activated carbon filter sheet, and slots are parallel to each other on both the upper and lower surfaces of the activated carbon adsorber. A limiting block is provided inside the slot, and a spring is fixedly connected to the bottom of the limiting block. The end of the spring away from the limiting block is fixedly connected to the activated carbon adsorber. A slot is provided in the middle of the upper and lower surfaces of the activated carbon filter sheet, and a pressing block is movably connected to the front end of the activated carbon filter sheet. Connecting rods are fixedly connected to both ends of the pressing block, and a push block is fixedly connected to the upper end of the connecting rod. A second spring is fixedly connected to the end of the connecting rod away from the pressing block.

[0007] Preferably, the second spring is installed inside the activated carbon filter, and its end away from the connecting rod is fixedly connected to the activated carbon filter. The connecting rod is movably installed inside the activated carbon filter. A groove is formed on the front surface of the activated carbon filter. The outer diameter of the activated carbon filter matches the inner diameter of the groove. The activated carbon filter is movably installed with the activated carbon adsorber through the groove. A second connecting pipe is fixedly connected to the right end of the activated carbon adsorber.

[0008] Preferably, the cooling mechanism includes a cooling chimney and a cooler. A tail gas collection pipe is fixedly connected to the bottom left side of the cooling chimney. The end of the tail gas collection pipe away from the cooling chimney is fixedly connected to an extraction device. The bottom of the tail gas collection pipe has an inverted conical design. A connecting pipe is fixedly connected to the top of the cooling chimney. The end of the connecting pipe away from the cooling chimney is fixedly connected to an activated carbon adsorber.

[0009] Preferably, a cooling coil is fixedly connected inside the cooling chimney, the input end of the cooling coil extends through the cooling chimney outward and is fixedly connected to the refrigerator, and the output end of the cooling coil is fixedly connected to a return pipe, the end of the return pipe away from the cooling coil being fixedly connected to the refrigerator.

[0010] Preferably, both the cooling chimney and the refrigeration unit are fixedly installed at the top of the recycling pool.

[0011] Preferably, a discharge pipe is fixedly connected to the lower left end of the recycling pool, and a valve is fixedly connected to the upper end of the discharge pipe.

[0012] Preferably, a catalytic burner is fixedly connected to the end of the connecting pipe away from the activated carbon adsorber, a catalyst carrier is fixedly installed inside the catalytic burner, and a combustion-supporting chimney is fixedly connected to the top of the catalytic burner.

[0013] Beneficial effects

[0014] This invention provides a dimethyl carbonate extraction device. Compared with the prior art, it has the following advantages:

[0015] Beneficial effects:

[0016] (1) The dimethyl carbonate extraction equipment solves the problem of complicated and time-consuming replacement process of activated carbon adsorber filter element by setting the activated carbon filter to automatically lock after insertion and unlock by pressing the pressing block. This reduces the working time of maintenance personnel and increases the applicability of the device. At the same time, the activated carbon adsorber can absorb small molecules in the exhaust gas, which is convenient for the next step of exhaust gas combustion treatment.

[0017] (2) The dimethyl carbonate extraction equipment can liquefy the exhaust gas through the cooling mechanism, so that the organic matter in the exhaust gas condenses into liquid, and the valuable part of the exhaust gas is recovered and treated, reducing the waste of resources. The organic matter condensate can be centrally stored through the recovery tank, which is convenient for subsequent treatment. The exhaust gas can be fully burned through the catalytic burner, reducing its pollution to the atmospheric environment. Attached Figure Description

[0018] Figure 1 This is a perspective view of the external structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cooling mechanism structure of this utility model;

[0020] Figure 3 This is a cross-sectional view of the internal structure of the activated carbon adsorber of this utility model;

[0021] Figure 4 This is the utility model Figure 3 Enlarged view of part A of the structure;

[0022] Figure 5 This is a schematic diagram of the activated carbon filter structure of this utility model;

[0023] Figure 6 This is the utility model Figure 5 Enlarged view of part B of the structure;

[0024] Figure 7 This is a cross-sectional view of the catalyst support structure of this utility model.

[0025] In the diagram: 1. Extraction device; 2. Cooling mechanism; 21. Cooling chimney; 22. Exhaust gas collection pipe; 23. Refrigerator; 24. Cooling coil; 25. Return pipe; 26. Connecting pipe one; 3. Recovery tank; 31. Discharge pipe; 32. Valve; 4. Activated carbon adsorber; 41. Slot; 42. Limiting block; 43. Spring one; 44. Activated carbon filter; 45. Grooving; 46. Pulling groove; 47. Pressing block; 48. Connecting rod; 49. Pushing block; 410. Spring two; 411. Connecting pipe two; 5. Catalytic burner; 51. Catalyst carrier; 52. Combustion chimney. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] Please see Figure 1-6 A dimethyl carbonate extraction device includes an extraction device 1, a cooling mechanism 2 connected to one end of the extraction device 1, a recovery tank 3 provided at the bottom of the cooling mechanism 2, and an activated carbon adsorber 4 connected to the top of the cooling mechanism 2. The activated carbon adsorber 4 includes an activated carbon filter 44. The upper and lower surfaces of the activated carbon adsorber 4 are provided with parallel slots 41. A limiting block 42 is provided inside the slot 41. A spring 43 is fixedly connected to the bottom of the limiting block 42. The end of the spring 43 away from the limiting block 42 is fixedly connected to the activated carbon adsorber 4. A slot 45 is provided in the middle of the upper and lower surfaces of the activated carbon filter 44. A pressing block 47 is movably connected to the front end of the activated carbon filter 44. A connecting rod 48 is fixedly connected to both ends of the pressing block 47. A push block 49 is fixedly connected to the upper end of the connecting rod 48. A spring 410 is fixedly connected to the end of the connecting rod 48 away from the pressing block 47.

[0029] Spring 410 is installed inside the activated carbon filter 44, and its end away from the connecting rod 48 is fixedly connected to the activated carbon filter 44. The connecting rod 48 is movably installed inside the activated carbon filter 44. A groove 46 is opened on the front surface of the activated carbon filter 44. The outer diameter of the activated carbon filter 44 matches the inner diameter of the slot 41. The activated carbon filter 44 is movably installed with the activated carbon adsorber 4 through the slot 41. The right end of the activated carbon adsorber 4 is fixedly connected to the connecting pipe 411.

[0030] In this embodiment, after the flue gas enters the activated carbon adsorber 4, the residual small molecules are adsorbed by the activated carbon filter 44 set inside the activated carbon adsorber 4. By setting multiple sets of activated carbon filter 44, the exhaust gas can be fully adsorbed. The exhaust gas with the adsorbed residual small molecules is discharged from the activated carbon adsorber 4 through the connecting pipe 411. When the activated carbon filter 44 needs to be replaced, the user only needs to press the pressing block 47. The pressing block 47 carries the connecting rod 48 to move towards the spring 410. The push block 49 located above the connecting rod 48 pushes the limiting block 42 out of the slot 45, so that the limiting block 42 can no longer limit the activated carbon filter 44. The activated carbon filter 44 can be pulled out from the inside of the activated carbon adsorber 4. The spring 410 can reset the pressing block 47 after it has been pressed and released. When a new activated carbon filter 44 is inserted into the activated carbon adsorber 4, the front sides of the activated carbon filter 44 push the limiting block 42 open. When the slots 45 on the upper and lower sides of the activated carbon filter 44 move below the limiting block 42, the pushing force on the limiting block 42 disappears. The elasticity of the spring 43 causes the limiting block 42 to rebound into the slot 45. The edge of the limiting block 42 is close to the edge of the slot 45, which limits the activated carbon filter 44, thus completing the automatic locking of the activated carbon filter 44.

[0031] Example 2:

[0032] Please see Figure 1-7 This embodiment provides a technical solution based on embodiment one: the cooling mechanism 2 includes a cooling chimney 21 and a cooler 23. A tail gas collection pipe 22 is fixedly connected to the bottom left side of the cooling chimney 21. The end of the tail gas collection pipe 22 away from the cooling chimney 21 is fixedly connected to the extraction device 1. The bottom of the tail gas collection pipe 22 has an inverted conical design. A connecting pipe 26 is fixedly connected to the top of the cooling chimney 21. The end of the connecting pipe 26 away from the cooling chimney 21 is fixedly connected to the activated carbon adsorber 4.

[0033] A cooling coil 24 is fixedly connected inside the cooling chimney 21. The input end of the cooling coil 24 extends out of the cooling chimney 21 and is fixedly connected to the refrigerator 23. A return pipe 25 is fixedly connected to the output end of the cooling coil 24. The end of the return pipe 25 away from the cooling coil 24 is fixedly connected to the refrigerator 23.

[0034] The cooling chimney 21 and the refrigeration unit 23 are both fixedly installed at the top of the recycling pool 3.

[0035] A discharge pipe 31 is fixedly connected to the lower left end of the recycling pool 3, and a valve 32 is fixedly connected to the upper end of the discharge pipe 31.

[0036] A catalytic burner 5 is fixedly connected to the end of the connecting pipe 411 away from the activated carbon adsorber 4. A catalyst carrier 51 is fixedly installed inside the catalytic burner 5, and a combustion chimney 52 is fixedly connected to the top of the catalytic burner 5.

[0037] In this embodiment, the condensable organic matter in the exhaust gas is recovered by the cooling mechanism 2, and the coolant in the cooling coil 24 is cooled by the refrigerator 23. The coolant should be kept at a temperature of about -20°C. When the exhaust gas enters the interior of the cooling chimney 21 through the exhaust gas collection pipe 22, the exhaust gas rises upwards along the cooling coil 24. During the ascent, the exhaust gas exchanges heat with the low-temperature coolant inside the cooling coil 24, causing the temperature of the condensable organic matter to decrease. After reaching the dew point, it gradually liquefies. The liquefied condensable organic matter... Under the influence of gravity, condensable organic matter flows along the cooling coil 24 to the bottom of the cooling chimney 21. Because the bottom of the cooling chimney 21 is conical, the condensable organic matter will automatically flow into the recovery pool 3 at the bottom of the cooling chimney 21. The staff can periodically open the discharge pipe 31 through the valve 32 to recover the condensable organic matter. The exhaust gas after condensation and recovery enters the activated carbon adsorber 4. After the small molecule organic matter is adsorbed by the activated carbon adsorber 4, the exhaust gas enters the catalytic burner 5 and undergoes catalytic combustion at a suitable temperature. After meeting the standards, it is discharged.

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dimethyl carbonate extraction plant comprising an extraction device (1), characterized in that: One end of the extraction device (1) is connected to a cooling mechanism (2), the bottom end of the cooling mechanism (2) is provided with a recovery tank (3), the top end of the cooling mechanism (2) is connected to an activated carbon adsorber (4), the activated carbon adsorber (4) includes activated carbon filter sheets (44), the upper and lower surfaces of the activated carbon adsorber (4) are provided with parallel slots (41), the slots (41) are provided with limit blocks (42) inside, the bottom end of the limit blocks (42) is fixedly connected to a spring (43), the spring (43) 43) The end away from the limiting block (42) is fixedly connected to the activated carbon adsorber (4). The activated carbon filter (44) has a slot (45) in the middle of the upper and lower surfaces. The front end of the activated carbon filter (44) is movably connected to a pressing block (47). The two ends of the pressing block (47) are fixedly connected to a connecting rod (48). A push block (49) is fixedly connected to the upper end of the connecting rod (48). A spring (410) is fixedly connected to the end of the connecting rod (48) away from the pressing block (47).

2. A dimethyl carbonate extraction apparatus according to claim 1, characterized by: The second spring (410) is installed inside the activated carbon filter (44), and the end away from the connecting rod (48) is fixedly connected to the activated carbon filter (44). The connecting rod (48) is movably installed inside the activated carbon filter (44). A groove (46) is opened on the front surface of the activated carbon filter (44). The outer diameter of the activated carbon filter (44) matches the inner diameter of the slot (41). The activated carbon filter (44) is movably installed with the activated carbon adsorber (4) through the slot (41). The right end of the activated carbon adsorber (4) is fixedly connected to the second connecting pipe (411).

3. A dimethyl carbonate extraction apparatus according to claim 1, characterized by: The cooling mechanism (2) includes a cooling chimney (21) and a cooler (23). A tail gas collection pipe (22) is fixedly connected to the left side of the bottom end of the cooling chimney (21). The end of the tail gas collection pipe (22) away from the cooling chimney (21) is fixedly connected to the extraction device (1). The bottom of the tail gas collection pipe (22) is designed with an inverted cone shape. A connecting pipe (26) is fixedly connected to the top of the cooling chimney (21). The end of the connecting pipe (26) away from the cooling chimney (21) is fixedly connected to the activated carbon adsorber (4).

4. A dimethyl carbonate extraction apparatus according to claim 3, characterized by: A cooling coil (24) is fixedly connected inside the cooling chimney (21). The input end of the cooling coil (24) extends out of the cooling chimney (21) and is fixedly connected to the refrigerator (23). A return pipe (25) is fixedly connected to the output end of the cooling coil (24). The end of the return pipe (25) away from the cooling coil (24) is fixedly connected to the refrigerator (23).

5. A dimethyl carbonate extraction apparatus according to claim 4, characterised in that: The cooling chimney (21) and the refrigerator (23) are both fixedly installed at the top of the recycling pool (3).

6. A dimethyl carbonate extraction apparatus according to claim 1, characterized by: The lower left end of the recycling tank (3) is fixedly connected to a discharge pipe (31), and the upper end of the discharge pipe (31) is fixedly connected to a valve (32).

7. A dimethyl carbonate extraction apparatus according to claim 2, characterized by: The connecting pipe two (411) is fixedly connected with a catalytic combustor (5) at one end away from the activated carbon adsorber (4), a catalyst carrier (51) is fixedly installed in the catalytic combustor (5), and a combustion chimney (52) is fixedly connected to the top end of the catalytic combustor (5).

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